From the Manufacturers Label: BCAAs may be the most important aminos for athletes and bodybuilders as they are directly involved in protein synthesis at the genetic level. BCAAs can also be broken down and used as an energy source to fuel exercise as needed. BCAA Powder supplies a precise, clinically studied ratio of Leucine, Valine and Isoleucine (45/30/25).BCAA Powder can be taken after training or athletic competition to accelerate recovery and help maximize your genetic potential.